| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.mapreduce.v2.app.job.impl; |
| |
| import java.util.Collection; |
| import java.util.Set; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.MapTaskAttemptImpl; |
| import org.apache.hadoop.mapreduce.MRJobConfig; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.security.token.JobTokenIdentifier; |
| import org.apache.hadoop.mapreduce.split.JobSplit.TaskSplitMetaInfo; |
| import org.apache.hadoop.mapreduce.v2.api.records.JobId; |
| import org.apache.hadoop.mapreduce.v2.api.records.TaskId; |
| import org.apache.hadoop.mapreduce.v2.api.records.TaskType; |
| import org.apache.hadoop.mapreduce.v2.app.metrics.MRAppMetrics; |
| import org.apache.hadoop.mapreduce.v2.app.TaskAttemptListener; |
| import org.apache.hadoop.security.token.Token; |
| import org.apache.hadoop.security.token.TokenIdentifier; |
| import org.apache.hadoop.yarn.Clock; |
| import org.apache.hadoop.yarn.event.EventHandler; |
| |
| |
| public class MapTaskImpl extends TaskImpl { |
| |
| private final TaskSplitMetaInfo taskSplitMetaInfo; |
| |
| public MapTaskImpl(JobId jobId, int partition, EventHandler eventHandler, |
| Path remoteJobConfFile, Configuration conf, |
| TaskSplitMetaInfo taskSplitMetaInfo, |
| TaskAttemptListener taskAttemptListener, OutputCommitter committer, |
| Token<JobTokenIdentifier> jobToken, |
| Collection<Token<? extends TokenIdentifier>> fsTokens, Clock clock, |
| Set<TaskId> completedTasksFromPreviousRun, int startCount, |
| MRAppMetrics metrics) { |
| super(jobId, TaskType.MAP, partition, eventHandler, remoteJobConfFile, |
| conf, taskAttemptListener, committer, jobToken, fsTokens, clock, |
| completedTasksFromPreviousRun, startCount, metrics); |
| this.taskSplitMetaInfo = taskSplitMetaInfo; |
| } |
| |
| @Override |
| protected int getMaxAttempts() { |
| return conf.getInt(MRJobConfig.MAP_MAX_ATTEMPTS, 4); |
| } |
| |
| @Override |
| protected TaskAttemptImpl createAttempt() { |
| return new MapTaskAttemptImpl(getID(), nextAttemptNumber, |
| eventHandler, jobFile, |
| partition, taskSplitMetaInfo, conf, taskAttemptListener, |
| committer, jobToken, fsTokens, clock); |
| } |
| |
| @Override |
| public TaskType getType() { |
| return TaskType.MAP; |
| } |
| |
| protected TaskSplitMetaInfo getTaskSplitMetaInfo() { |
| return this.taskSplitMetaInfo; |
| } |
| |
| /** |
| * @return a String formatted as a comma-separated list of splits. |
| */ |
| @Override |
| protected String getSplitsAsString() { |
| String[] splits = getTaskSplitMetaInfo().getLocations(); |
| if (splits == null || splits.length == 0) |
| return ""; |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < splits.length; i++) { |
| if (i != 0) sb.append(","); |
| sb.append(splits[i]); |
| } |
| return sb.toString(); |
| } |
| } |